to study the effects of integration of mechanical control with herbicides on yield and yield components of soybean (glycine max) a field experiment was conducted during 2003-2004 at the research farm of agronomy department, agriculture campus of tehran university, karaj. a randomized complete block design (rcbd) of 18 treatments was applied, each treatment being replicated 3 times. treatments i...

Com m on structural features were investigated for “light-dependent herbicides” (LD H s, also called peroxidizing or photobleaching herbicides). Q uantum chemical calculations of 143 herbicidal com pounds revealed that LU M O levels o f L D H s were sim ilar and strikingly low. Using the LUM O position as an anchor, presum ably know n structure-activity relation­ ships could be explained. Overa...

O principal método de controle plantas daninhas na cultura do alho é o químico, contudo essa extremamente sensível à herbicidas, podendo sofrer injúrias e redução produtividade dependendo dos produtos utilizados, modalidade aplicação, dose, cultivar, dentre outros. Assim objetivo presente estudo foi avaliar a seletividade herbicidas para cultivar Chonan, aplicados em diferentes modalidades apli...

Two hundred sediment samples were collected and their toxicity evaluated to aquatic species in a previous study in the agriculturally dominated Central Valley of California, United States. Pyrethroid insecticides were the main contributors to the observed toxicity. However, mortality in approximately one third of the toxic samples could not be explained solely by the presence of pyrethroids in ...